Tris base has a molecular weight of 121 g/mol. how many grams of tris base would you need to make 250ml of a 200mm solution

We need 6.05 grams of tris base to make this solution

Explanation:

Step 1: Data given

Molecular weight of tris base = 121 g/mol

volume of solution = 250 mL = 0.250 L

Molarity = 200 mM = 0.200 M

Step 2: Calculate moles tris base

Moles tris base = molarity * volume

Moles tris base = 0.200 M * 0.250 L

Moles tris base = 0.05 moles

Step 3: Calculate mass of tris base

Mass tris base = moles tris base * molar mass

Mass tris base = 0.05 moles * 121 g/mol

Mass tris base = 6.05 grams

We need 6.05 grams of tris base to make this solution

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